# sillimanite

> English word · Noun

## Definitions
1. A fibrous neosilicate mineral, polymorphic with andalusite and kyanite, with the chemical formula Al₂SiO₅.

## Etymology
From Silliman + -ite. Named after American chemist and geologist Benjamin Silliman (1779-1864) in 1824.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/sillimanite